The correct option is D All of these
The implantation of the blastocyst anywhere other than the endometrial lining of the uterine cavity results in ectopic pregnancy.
The unusual sites of implantation include fallopian tube, cervix and ovary.
The most common site of implantation in ectopic pregnancy is the fallopian tube. Over 98% of ectopic pregnancies implant in the fallopian tube.
Implantation in the cervix and ovary is very rare but such cases have been reported.
Ectopic pregnancy results in serious complications.